Complex compounds of cinchophen and its derivatives



' conditions hexamethylene tetramine, a-"phenylusualmanner. E'Thecooled melt is abrittle glassy The new compounds thus produced differ very 5 It has beenfound to be advantageous for many" 40 solution irrwater is typically colloidal rather than and l-p'he y12.3-d y -py 10ne. or their 40 Patented Nov. 9, 1937 UNITED STATES PATENT OFFICE COMPLEX' COMPOUNDS' OF CINCHOPHEN iAND ITS DERIVATIVES Fritz W. Bramigk, Detroit, Mich.

No Drawing. Application February 2,1935, Serial No..4,717

The present invention relates to a process of For example: 218 grams of hexamethylene tetproduoing water soluble molecular compounds of ramine,* 360 :gra.ms of 1-pheny1-2.3-dimethyl-4- hexamethylene tetramine, phenyl-quinoline cardimthylamino-S-pyrazolone and 422 grams of boxylio acid compounds, and pyrazolone' 'comsthecalciumsalt'of 2-phenylquinoline-l-carbox 5'-pounds, particularly alkylated pyrazolones and ,"ylic.acid:are.'pulverizedand thoroughly mixed. 5 falkylated amino-pyrazolones. Theamixtureis heatedtslo-wly up to 120125 C. It has been found that new compounds of-valuand. kept at this temperature, preferably with R able physical and therapeutical-properties may be -.-agitation until a clear melt is formed. The melt produced by reacting together under suitablew is::then- .allowed torcoola and is pulverized in the quinoline carboxylic acid compound, such as the mass and when pulverized forms an amorphous, calcium salt of 2-phenyl-quinoline-4=carboxylic slightly yellow powder, melting at 82 C. and soluacid, anda pyrazolone compound, such-as l-phenlibletatzthe' ratex'ofi 1.5::grams in 100 cubic centiyl-2.3-dimethyl4-dimethylamino 5 --pyrazolone. .*meters of water at 25C.

@ decidedly in their properties from the initial subz'purposes-to mix :the powdered compound with, stances from which they are made. for :example, :an' equal weight'of gelatin. This For example, the calcium salt of 2-phenyl- "rz'tendsto preventzsticking orilumping ofthe prodquinolinel-carboxylic acid, exists in the-form of /1:.uct-"at"high-temperaturesand in hot climates.

colorless crystals, needles and columns, insoluble '.i"'It?a1so stabilizes the solution of the compound in 20 in water and melting, if at all, above 260 C.-,'at f-Watersothat hydrolysis is'very much slowenand whichtemperature the substance-begins-to char; for internal administration the presence of 'the hexamethylene tetramine'forms' colorless colum- ;-"sgelatin-v isinot: only harmless but may even be nar crystals readily solub-le'in water to the extent helpfulbecause'ofitstdiluent eflect.

of 1 gram in 1.5 grams of water at 25 C;, forming Ingeneral the compounds of the invention com- 25 a typical crystalloid solution. It does not melt, prise at least one molecule of hexamethylene tetbut sublimes at 263 C. with partial decomposi- :raminerand at least .one'molecule of a-pyrazolone tion; and the l-phenyl-2-.3-dimethyl-4-dimethylcompound .toaeach molecule ofphenyl-quinoline amino- 5-pyrazolone crystallizes in colorless shin- .icarboxylic acid compound.

3 ing leaves,-readily soluble in water to a typically "Theiterm phenyl-quinoline carboxylic acid comcrystalloid solution, and melts at 108 C. I pound in: the specification and claims includes 'The compound formed from'one'molecule of *salts,xfor example, alkali and alkali earth metal the-phenyl-quinoline carboxylic acid compound, salts; and the esters 'of phenyl-quinoline carboxtwo molecules of hexamethylene tetramine and ylio acid and of homologues and derivatives two molecules of the pyrazolone compound forms thereof, for example, the-ethyl ester of 6-methy1- 35 an amorphous, almost colorless; slightlyyellow 2-ph nyl-quin a y a d- As n t powder, having a melting pointof 82 C." and a case of' the salts, the ethyl ester is contained in maximum solubility in water o f about 1.5grams the proportion" of one molecule thereof to one or in 100 cubic centimeters of water at 25 C. The more molecules each of hexamethylene tetramine crystalloidal, producing foam when shaken and "-'equivalents mentioned herein.

showing the Tyndall eifect. Only upon prolonged The term pyrazolone includes l-p-henyl-2.3-ditreatment with boiling water do the new commethyl-5-pyrazolone and homologues and derivapounds hydrolyze, precipitating the phenyl-quinotives thereof.

line carboxylic acid compound in its original in- With respect to their physical and therapeu- 45 soluble form, the pyrazolone compound and the tical properties, the products of this invention hexamethylene tetramine going into solution, may be compared with cinchophen which they while the latter is split up into ammonia and are intended to replace. These products are preformaldehyde. scribed for muscular and rheumatic pains, prin- The new compounds may advantageously be cipally, and also for arthritis, influenza, neuritis, 50 produced by heating together the phenyl-quinocolds and the like. The calcium salt prepared acline carboxylic acid compound, the hexamethylene cording to the invention may be taken in capsule tetramine and the pyrazolone compound in subor tablet form, preferably the former, four grains stantially molecular or polymolecular proporto a capsule or tablet taken three times daily ti after meals. It is water soluble and therefore more readily assimilated than cin'chophen. It does not have the irritating effect of cinchophen and is twice as effective as cinchophen for uric acid elimination. Therefore, it may be prescribed in smaller doses.

Further, this calcium salt is considerably less poisonous than ordinary cinchophen. Its toxicity is two to two and one-half (2 to 2 grams per kilogram of body weight when takenb-y mouth and one-half to one /2 to 1) gram per kilogram of body weight when taken hypodermically. The toxicity of ordinary cinchophen is much lower, that is, a smaller amount of cinchophen will produce a given toxic effect on the experimental animal.

The sodium salt prepared according to the invention has similar properties and characteristics and is preferably used in the form of an ointment for muscular and rheumatic pains and the like.

I claim:

1. A complex compound resulting from the interaction of one molecule of a phenyl quinoline carboxylic acid compound selected from the group consisting of neocinchophen, cinchophen, and the alkali-forming metal salts of cinchophen, with at least one molecule of hexamethylene tetramine and at least one molecule of a pyrazolone compound selected from the group consisting of 1-phenyl2.3-dimethyl-5-pyrazolone and l-phenyl 2.3 dimethyl-l-dimethylamino-5 pyrazolone.

2. A complex compound resulting from the interaction of one molecule of phenyl quinoline carboxylic acid compound selected from the group consisting of neocinchophen, cinchophen, and the alkali-forming metal salts of cinchophen, with two molecules of hexamethylene tetramine and two molecules of a pyrazolone compound selected from the group consisting of l-phenyl- 2.3-dimethyl-5-pyrazolone and 1-phenyl-2.3-dimethyl4-dimethylamino-5 pyrazolone.

3. A complex compound resulting from the interaction of one molecule of the calcium salt of 2-phenyl-quinoline-4-carboxylic acid with at least one molecule of hexamethylene tetramine and at least one molecule of 1-phenyl-2.3-dimethyl--dimethylamino-5pyrazolone.

4. A complex compound resulting from the interaction of one molecule of the calcium salt of 2-phenyl-quinolinel-carboxylic acid with two molecules of hexamethylene tetramine and two molecules of l-phenyl-2.3-dimethyl-4-dimethylamino-5-pyrazolone.

5. A complex compound resulting from the interaction of one molecule of the ethyl ester of 6- methyl 2 phenyl-quinoline 4 carboxylic acid with at least one molecule of hexamethylene tetramine and at least one molecule of l-phenyl- 2.3-dimethyl-5-pyrazo1one.

6. A complex compound resulting from the interaction of one molecule of the ethyl ester of 6-methyl-2-phenyl-quinoline 4 carhoxylic acid with two molecules of hexamethylene tetramine and two molecules of 1-phenyl-2.3-dimethyl-5- pyrazolone.

7. A method of producing new complex compounds which comprises heating together one molecule of a phenyl quinoline carboxylic acid compound selected from the group consisting of neo-cinchophen, cinchophen, and the alkaliforming metal salts of cinchophen, with at least one molecule of hexamethylene tetramine and at least one molecule of a pyrazolone compound selected from the group consisting of l-phenyl- 2.3-dimethyl-5-pyrazolone and 1-phenyl-2.3-di methyl-4-dimethylamino-5 pyrazolone until a clear melt is obtained.

8. A method of producing new complex compounds which comprises heating together one molecule of a phenyl quinoline carboxylic acid compound selected from the group consisting of neo-cinchophen, cinchophen, and the alkaliforming metal salts of cinchophen, with two molecules of hexamethylene tetramine and two molecules of a pyrazolone compound selected from the group consisting of 1-phenyl-2.3-dimethyl-5-pyrazolone and 1-phenyl-2.3-dimethyl- 4-dimethyla-mino-5 pyrazolone until a clear melt is obtained.

9. A method of producing new complex compounds which comprises heating together one molecule of the calcium salt of 2-phenyl-quinoline-4-carboxylic acid with at least one molecule of hexamethylene tetramine and at least one molecule of 1-phenyl-2.3-dimethyl-4-dimethylamino-5-pyrazolone until a clear melt is obtained.

10. A method of producing new complex compounds which comprises heating together one molecule of the calcium salt of Z-phenyl-quinolinel-carboxylic acid with two molecules of hexamethylene tetramine and two molecules of l -phenyl 2.3 dimethyl-4 -dimethylamino-5-pyrazolone until a clear melt is obtained.

11. A method of producing new complex compounds which comprises heating together one' molecule of the ethyl ester of 6-methyl-2-phenylquinoline-4-carboxylic acid with at least one molecule of hexamethylene tetramine and at least one molecule of 1-phenyl-2.3-dimethyl-5- pyrazolone until a clear melt is obtained.

12. A method of producing new complex compounds which comprises heating together one molecule of the ethyl ester of 6-methyl-2-phenylquinoline-4-carboxylic acid with two molecules of hexamethylene tetramine and two molecules of 1-phenyl-2.3-dimethyl-S-pyrazolone until a clear melt is obtained.

FRITZ W. BRAMIGK. 

